Institutional Ownership
Immunogen Inc
CUSIP 45253H101COMIMGNEURQ1 2026
13D / 13G Filings
39
Schedule 13D/13G on record
Beneficial Filers
11
Distinct reporting persons
Largest Stake
11.3%
Max % of class reported
Institutional Holders
1
13F filers (latest quarter)
Beneficial Owners — Schedule 13D / 13G
39 filings · latest Feb 14, 2024
| # | Filed | Reporting Person | Form | % of Class | Shares | Filing |
|---|---|---|---|---|---|---|
| 1 | Feb 14, 2024 | Ra Capital Management, L.P. | 13G/A | 10.0% | 26.92M | SEC |
| 2 | Feb 14, 2024 | Redmile Group, LLC | 13G/A | 5.9% | 16.42M | SEC |
| 3 | Feb 13, 2024 | Vanguard Group Inc | 13G/A | 9.1% | 25.47M | SEC |
| 4 | Feb 7, 2024 | Adage Capital Partners Gp, L.L.C. | 13G/A | 0.3% | 971.9K | SEC |
| 5 | Jan 25, 2024 | Blackrock Inc. | 13G/A | 8.2% | 21.82M | SEC |
| 6 | Jan 22, 2024 | State Street Corp | 13G/A | 3.0% | — | SEC |
| 7 | Feb 14, 2023 | Ra Capital Management, L.P. | 13G/A | 10.0% | 22.08M | SEC |
| 8 | Feb 14, 2023 | Redmile Group, LLC | 13G/A | 8.6% | 19.90M | SEC |
| 9 | Feb 10, 2023 | Flynn James E | 13G/A | 2.9% | 6.36M | SEC |
| 10 | Feb 9, 2023 | Vanguard Group Inc | 13G/A | 6.5% | 14.38M | SEC |
29 more beneficial-ownership filings on Premium
See the full Schedule 13D/13G history for Immunogen Inc.
Unlock full historyTop Institutional Holders (13F)
Largest reported positions · latest quarter
| # | Fund | Shares | Value |
|---|---|---|---|
| 1 | Huntington National Bank | 1 | $269 |